Portion of a watch



FIG. 1 is a front right perspective view of a portion of a watch showingmy new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of the buttons and the remainder of the watch isfor illustrative purposes only and forms no part of the claimed design.

The ornamental design for a portion of a watch, as shown and described.